Building a Better Trifocal Alternative

Optical Confusion: Progressive Lens Makers Try to Fine Tune Products

By

Angela Chen

Oct. 7, 2013 7:19 p.m. ET

For eyeglass wearers who want to avoid the telltale bifocal line, progressive lenses have become an attractive option—but they present some practical problems.

Many people who wear the graduated prescription lenses with their three viewing zones—close-up, midrange and distance—say they can sometimes make objects looks like they're moving. Playing sports in them is tricky as they can create blurry peripheral vision and make depth...